gistfile1.js

// based heavily off:
// https://sites.google.com/a/van-steenbeek.net/archive/explorer_domparser_parsefromstring
if( typeof window.DOMParser === "undefined" ){
    window.DOMParser = function(){};

    window.DOMParser.prototype.parseFromString = function(str, contentType){
        if(typeof ActiveXObject !== 'undefined'){
            var xmldata = new ActiveXObject('MSXML.DomDocument');
            xmldata.async = false;
            xmldata.loadXML(str);
            return xmldata;
        } else if(typeof XMLHttpRequest !== 'undefined'){
            var xmldata = new XMLHttpRequest;

            if(!contentType){
                contentType = 'application/xml';
            }

            xmldata.open('GET', 'data:' + contentType + ';charset=utf-8,' + encodeURIComponent(str), false);

            if(xmldata.overrideMimeType) {
                xmldata.overrideMimeType(contentType);
            }

            xmldata.send(null);
            return xmldata.responseXML;
        }
    };
}